Toy building brick



FIG. 1 is a top perspective view of a toy building brick showing my new design, a bottom perspective view being a mirror thereof;

FIG. 2 is a top view of the toy building brick, a bottom view being a mirror image thereof;

FIG. 3 is a front side view of the toy building brick, a rear side view being a mirror thereof;

FIG. 4 is a cross-sectional view of the toy building brick taken along line 4-4 of FIG. 2 to illustrate a depth of openings therein; and,

FIG. 5 is a cross-sectional view of the toy building brick taken along line 5-5 of FIG. 2 to illustrate a depth of the openings therein. 

CLAIM The ornamental design for a toy building brick, as shown and described. 